After four days inside the pagoda, Laws of fire were very close to Fei. They were in the form of red dots, running around his body but never dare to approach him. But at this moment, Fei suddenly mumbled "Please come"
At this moment, his spiritual power erupts around him. He was telling those laws of fire to blend with his body. Blending means to merge but with deeper meaning. It is the action of merging two parts equally. So, on this floor, he can't control the laws instead he blends himself with the laws.
This allows him to use the power of laws, while not restricting him. Hearing his call, red dots spread everywhere but still didn't approach him. Slowly, Fei tried to gain more knowledge over the Law of Fire. He doesn't want to force them; neither has he had the power to force them.
